A novel two-channel time-interleaved forth-order sigma-delta modulator topology

Author

Yang, Xiao ; Chen, Guican ; Cheng, Jun ; Xu, Xiaoyun

Author_Institution

Dept. of Microelectron., Xian Jiaotong Univ., Xian

fYear

2008

fDate

Nov. 30 2008-Dec. 3 2008

Firstpage

1152

Lastpage

1155

Abstract

Time-interleaved (TI) sigma-delta modulators are sensitive to channel-mismatches. In this paper, a new type of noise transfer function (NTF) which is a band-pass filter is adopted for the two-channel TI modulators to reduce the folded noise. Employing the concept of block digital filtering and theory of multirate operations, a novel two-channel TI high-order modulator is derived from the prototype of a conventional single-channel modulator. The simulation results show that the proposed modulator is insensitive to channel mismatches.

Keywords

band-pass filters; digital filters; network topology; sigma-delta modulation; transfer functions; band-pass filter; block digital filtering; conventional single-channel modulator; forth-order sigma-delta modulator topology; noise transfer function; two-channel time-interleaved modulator; Band pass filters; Bandwidth; Delta-sigma modulation; Digital filters; Digital modulation; Filtering theory; Noise reduction; Sampling methods; Topology; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on

Conference_Location

Macao

Print_ISBN

978-1-4244-2341-5

Electronic_ISBN

978-1-4244-2342-2

Type

conf

DOI

10.1109/APCCAS.2008.4746229

Filename

4746229